Results 231 to 240 of about 105,146 (299)
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Discovery of Vapor Deposits in the Lunar Regolith
Science, 1993Lunar soils contain micrometer-sized mineral grains surrounded by thin amorphous rims. Similar features have been produced by exposure of pristine grains to a simulated solar wind, leading to the widespread belief that the amorphous rims result from radiation damage. Electron microscopy studies show, however, that the amorphous rims are compositionally
L P, Keller, D S, McKay
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1990
Abstract The lunar regolith consists of the fragmental unconsolidated mantle which overlies more consolidated or crystalline rocks at the surface of the moon. The thickness of the regolith ranges from a few meters in some areas overlying mare basalt flows to tens of meters over much of the highland terrain.
D.S. Mckay, D.W. Ming
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Abstract The lunar regolith consists of the fragmental unconsolidated mantle which overlies more consolidated or crystalline rocks at the surface of the moon. The thickness of the regolith ranges from a few meters in some areas overlying mare basalt flows to tens of meters over much of the highland terrain.
D.S. Mckay, D.W. Ming
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Evaluations of lunar regolith simulants
Planetary and Space Science, 2016Apollo lunar regolith samples are not available in quantity for engineering studies with In-Situ Resource Utilization (ISRU). Therefore, with expectation of a return to the Moon, dozens of regolith (soil) simulants have been developed, to some extent a result of inefficient distribution of NASA-sanctioned simulants.
Taylor, Lawrence A. +2 more
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Improved Electrodynamic Particle-Size Sorting System for Lunar Regolith
Journal of Aerospace Engineering, 2022In situ resource utilization (ISRU) of lunar regolith is indispensable for the success of large-scale and long-term human lunar explosions at lower costs.
H. Kawamoto +2 more
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The porosity of the upper lunar regolith
Icarus, 2016Abstract The porosity of the upper centimeter or so of the lunar regolith strongly affects several properties that are commonly studied remotely. Hence, it is important to determine its value. We have reanalyzed the data of Ohtake et al. (Ohtake et al. [2010]. Space Sci.
Bruce Hapke, Hiroyuki Sato
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Journal of Geophysical Research: Planets, 2021
It is generally believed that the top centimeters of mature lunar regolith should be dominated by fine particles that contain few rocky fragments, but surface fragments are occasionally visible in mature lunar regolith.
C. Ding +7 more
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It is generally believed that the top centimeters of mature lunar regolith should be dominated by fine particles that contain few rocky fragments, but surface fragments are occasionally visible in mature lunar regolith.
C. Ding +7 more
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The extent of lunar regolith mixing
Earth and Planetary Science Letters, 1979The activity of solar cosmic-ray-produced Mn-53 measured as a function of depth in the upper 100 g/sq cm of lunar cores 60009-60010 and 12025-12028 is discussed. Analyses of samples from the Apollo 15 and 16 drill stems together with authors' previously published results (1974, 1976), and the Battelle Na-22 and Al-26 data, indicate that in three of the
K. Nishiizumi +5 more
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A Global Thermal Conductivity Model for Lunar Regolith at Low Temperatures
Journal of Geophysical Research: Planets, 2021Although some of the coldest surface temperatures in the entire Solar System are found near the poles of our own Moon, the thermophysical properties of lunar regolith at these ultracold temperatures (i.e., below ∼150 K) are not well understood.
A. Martinez, M. Siegler
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On the depth of the lunar regolith
The Moon, 1970The aim of this paper is to point out that if the sinuous rilles on the Moon represent trenches in the mare ground in which they meander, the existence of a great number of individual boulders on their slopes - as discovered on the high-resolution photographs taken by US Lunar Orbiters 4 and 5 in 1967 - suggests that the solid substrate of the lunar ...
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Re-Evaluating Influence of Rocks on Microwave Thermal Emission of Lunar Regolith Using CE-2 MRM Data
IEEE Transactions on Geoscience and Remote Sensing, 2021The influence of rocks on the microwave thermal emission (MTE) of the lunar regolith has not been fully studied with the four-channel microwave radiometer (MRM) data onboard Chang'e-1/2 satellites.
Z. Meng +7 more
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